import pandas as pd
import numpy as np

df = pd.DataFrame(np.random.randint(5, 300, size=(100, 3)), columns=['A', 'B', 'C'])

df.to_csv('output.csv', index=True, sep=' ')
df.to_excel('output.xlsx', index=False)
df.to_json('output.json', orient='records')

print(pd.read_csv('output.csv', sep=' '))
print(pd.read_excel('output.xlsx'))
print(pd.read_json('output.json', orient='records'))